Demountable rim for vehicle wheels



June 10; 1924. 1,497,295

A. s. HYDE DEIOUNTABLE RII FOR VEHICLE WHEELS Filed June 21. IQPO mums flRTHuRi HYDE Patented June 10, 1924 v 1,497,295 PATENT on-lot...

ARTHUR s. HYDE, or HARTFORD, connno'rrcur, assmnon TO BAUSH moms TOOL company, A conromrmn or messaonosm'rs.

nmrounmzenn am For. ynnxom wrrnsrs Application filed June 21, 1920. Serial No. 390,405.

To all whom it may concern.

Be it known that I, An'rH-nn S. HYDE, a citizen of the United States, resident of Hartford, Connecticut, and whose 5 oflice address is care Baush Machine 001 Company, Springfield, Massachusetts, have invented certain new and useful Im rovements in Demountable Rims for ehicle Wheels, of which the following is a spool:

fication.

My invention aims to provide a d'emount- 'able rim having certain advantages in light ness, strength, durability and ease of accurate manu acture, and adapted to carry an inflated pneumatic tire and to be readily detached from the wheel without disturbing the tireythe principal iin rovements being in the material and method of manufacture wherebys rim is produced having a new combination of advantageous qualities.

For many years aluminum and alloys thereof have been used to a greater or less extent, but no such alloy has been thought to be so pted for use in the making of wheel rims, having the necessary ph sical qualities to make a rim which shou be strong and durable against the strains nd blows which are received i.1 use and havin a high resistance to orrosion, and whic could bcu'eadily cast and forged and ma- "chinscl to the accuracy re uired for a good fit which would facilitate tie mounting and clemounting of it. I I have found that therezu'e certain alloys method of manufacture and treatment can he niacin into demrmntable rims which will have the qualities desired, with greater du 1's hility :trrd'much reater lightness than steel and at u rcasona is cost. These qualities make such a rimreatly desired for automobiles. Tires of-t e size now generally used are in themselves quite heavy and the added weight of a steel rim makes the mounting and demounting of them a. matter of. considerahle diiiiculty for any one except a conrrmrntively strong, person. The rims of my invention will reduce the weight of metal it: approximately 'onethird that of a. steel to rim so as to practically removethis objection. At the same time such rims are hammered and treated v ry roughly in practice and must have sullicicnt strength to sustain such treatment as well as the strains of use,

of aluminum which b an appropriatey 'There is thus and I have found that thesequalities are obposition and the method of manufacture the inner face of the rim so that it may slide freely on and oil the wheel. The alloy is cast into in ots, .worked as by rolling or for%ing into bi lets and then cut and forged, pre erably drop forged, into blanks in the form of a ring. 01' the alloy may be cast in rings and forged to dimensions. Such forging or otherwise workin of the metal increases its tensile strengt as for exam le,

from 27,000 pounds per square inch to 37, 00 or as high as 40,000 pounds.

The forged rings are then heated to :1 term perature approximating 500,120 525 degrees centi rude and quenched. Itsjs found that this cut treatment increases the physical qualities very substantiall For example, an alloy having beforehand an ultimate ten sile. strength of 36,000 pounds per square incli will have its strength increased to 55 000 or 60,000 pounds. The elastic limit will be raised from 25,000 pounds per square'inch to 36,000, the elongation from 2 to 20% and thereduction under strain from 6 to 40%.

reduced a metal havin approximately t e stren h of steel, with a comparativel friction ess quality which is high y desire is in demountahle rims, and of a weight .very much less, about one-third as great in fact.

The heat treatment is fective at once. It requires an aging of the not completely efmetal for a period of oneto five days in i order to bring it to the desired physical The aging of the metal characteristics.

' after the heat treatment serves also to bring it to a condition in which it machines or cuts better than beforex The machining can be done before the aging iscom late but it can he done better afterwards. r the forging or pressing operations may be suflicient ly dccurute'to avoid the necessit of any ma- 'chining. And instead of wor 'ng from a st tainable with the alloys of aluminum here referred to. A specific example of the com metal of comparatively high strength and elastic limit, though it consists chiefly of aluminum and weighs little more than aluminum.

The aluminum alloys above referred to and the heat treatment thereof have been known for a number of years. examples of the same being described in Wihn Patents No. 1,130,785 filed in 1911 and 1,261,987 filed in 1912. They have not been used however for wheel rims or the like ulthou 11 throughout this period numerous deve o ments in such rims have taken place and e orts' have been made to lighten and improve such rims. I have discovered that rims made of this aluminum alloy have not only the known qualities of lightness and stren th but also a quite unexpected resistance to a rasion and shock and have asmoothncss or lack of friction which makes it much easier 'to apply and demount them.

The best. resultshave been obtained with i an extensive worl-rin of thc'nlloy in making t for use in demountnble rims.

The reduction of weight effected by my improved rims is of very considerable importance in the reduction of theload to be carried by the motor. But it is particularly important. in that it brings the weight of the modern demountable rim and tire down from a point where they are almost too heavy to be handled by one unaccustomed to manual labor to a point where they can be easily handled by such persons.

The accom anying drawingsillustrate embodiments o the invention.

F ig. 1 is a radial seetion'of a rim with a lumping ring adjacent thereto;

Fig. 2 is a face elevation of thesame;

capable 0 transformation by heat ense tough, fibrous structure excellently adapted Fi s. 3 and 4 are similar sections of moclitied esigns.

Figs. 1 and 2 show the rim with a that central portion 1 and flanges 2 and made in one piece of the aluminum alloy described. The clamping ring -I- shown in juxtrqiosition with the denlonntable rim and of a common desi n, may also be made of the some alioy and y the same method of manufacture. Or the ordinary steel ring may be used for this purpose since its wei ht is comparatively slight and it is handled separately from the. demountable rim. In the matter of hendlin it is so small that the material of whiai it is made is not important; though in the matter of reducing the total weight of the vehicle its manufacture of the aluminum alloy constitutes a substantial contribntion.

According to Fig. 3 the int portion 1 of the rim is formed with one integral flange 2. Its opposite edge however is formed with a groove 5, and a flange 6 is cast in engagement with said groove so as to be locked in place. The flange 6 is of steel for econonrvs sake.

I prefer, however, to use the construction of Fig. 1 which is the some as that f ii 3 except thatlhe separate flange T is media also 01' the aluminum alloy.

Though I have described with git'ili' particularity of detail certain specific mhndiments of my invention, yet it is not to be understood therefrom that the invention is restricted to the exact designs, composition and methods described. Various modificw tions in these respects may be made by those skilled in the art without (i9 arting from the invention as defined in t.e following claims- W hat I claim is:

1. A demountahlc. rim for automobile wheels made of an aluminum alloy of the class described consistin nniinlv of ainminnm which has been wei hed and heat treated to increase its density. tensile strength and elastic limit.

2. A demountable rim for automobile wheels in combinriti'on with tiring tor ta ter ing the same on 11 wheel, both said par s be ing made of an aluminum alloy of the class described consisting nminlv of aluminum which has been worked and heat treated to increase its density, tensile strength and elastic limit.

' Inwitness whereof, I have hereunto signed my name.

' ARTHUR S. HYDE. 

